Compact Single-/Dual-Wideband BPF Using Stubs Loaded SIR (SsLSIR)
Compact Single-/Dual-Wideband BPF Using Stubs Loaded SIR (SsLSIR)
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DOI：
10.1109/lmwc.2013.2263220
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发表时间：
2013-05
影响因子：
3
通讯作者：
Jin Xu;Yu-Xue Ji;C. Miao;Wen Wu
中科院分区：
文献类型：
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作者：
Jin Xu;Yu-Xue Ji;C. Miao;Wen Wu
本文介绍了一种用于设计单/双宽带带通滤波器（BPF）的新型存根负载阶跃阻抗谐振器（SsLSIR）。所提出的SsLSIR具有多个可调谐的传输零点（TZs）和传输极点（TPs），可以通过排列来构建单/双宽带BPF。单频段BPF的中心频率为1.91 GHz， -3 dB分数带宽（FBW）为52.4%；双频BPF的中心频率为1.92/5.44 GHz， -3 dB FBW为66.7%/28.3%。单波段BPF的高阶杂散频率被调谐和抵消，从而在2.19至9.19 GHz范围内产生-20 dB杂散抑制的宽阻带。双频BPF的两个通带之间的TZs提供了宽带和高带间隔离。两种滤波器具有插入损耗低、物理拓扑结构简单、尺寸紧凑等优点。
This letter presents a new stubs loaded stepped impedance resonator (SsLSIR) to design single-/dual-wideband bandpass filter (BPF). The proposed SsLSIR exhibits multiple tunable transmission zeros (TZs) and transmission poles (TPs), which can be arranged to build up single/dual-wideband BPF. The proposed single-band BPF has a central frequency of 1.91 GHz with -3 dB fractional bandwidth (FBW) of 52.4% and the dual-band BPF has a central frequency of 1.92/5.44 GHz with -3 dB FBW of 66.7%/28.3%. The higher-order spurious frequencies of the single-band BPF are tuned and canceled by the TZs, resulting in a wide stopband with -20 dB spurious suppression from 2.19 to 9.19 GHz. The TZs between two passbands of the dual-band BPF provide a wideband and high band-to-band isolation. Two filters have the merits of low insertion loss, simple physical topology and compact size.